Heat-interchange device



E. WIRTH-FREY. HEAT INTERCHANGE DEVICE.

APPLICATION FILED NOV-b1919- IPatented Oct. III, WZL

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application iueui november i, i919. temi no.

To all whom it may concern:

lBe it known that ll, ELIAS WinTH-FREY, a citizen of the Republic of Switzerland, residing at Aarau, Laurenzvoi'stadt, Switzerland, have invented certain new and useful Improvements in Heat-interchange Devices; and l do hereby declare the fol-lowing to be a clear, full, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the ac# companying drawing, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in heat interchange devices andparticularly to .heating bodies adapted to be used in connection with evaporating devices for liquids,

The heating bodies hitherto proposed adapted to be arranged within evaporating devices and provided with vertical channels for the passage of the liquid to be evaporated, present the drawback that their channels have over the whole length the same cross-section, no consideration being given to the fact that the volume of the steam produced in the liquid to be Aevaporated increases toward the level of the liquid owing to the fact that the produced steam bubbles rise in the liquid and that the lower ones combine with the upper ones. When, therefore, the area of passage for the liquid is not greater at the top than at the bottom of the device, the regular and proper working of such evaporating devices is easily disturbed and the generation of steam is influenced in a detrimental manner from the economical point'of view.

rlFhe object of this invention is to eliminate the drawback referredto. To this end the heating bodies are so designed that the area of passage for the liquid to be evaporated increases toward the upper end of the heat interchange device.

The invention will now be more particularlydescribed with reference to the accompanying drawing illustrating by way of example two modes of -carrying-out the invention. ln this drawing:

Figure` l is a vertical section through the first embodiment.

Fi 2 is a horizontal section on the line lllifi of Fig. 1. y

Fig. 3 is a vertical sectionv through the second embodiment and Fig. 4- is a-horizonu tal section on the 'line lEV-fllV of Fig. 3.

Y Specification of Letters-Patent.

. circumstance that en nnyiciii.

Patented @et itil, 1921i.

atacar. Referring at lirst to Figs. 1 and 2 of the drawing, 1 designates a' cylindrical evaporating vessel. Within this vessel 1 is arranged vertically a hollow annular body 2' circular in cross-section.- The hollow 3 of this body 2 communicates with a pipe 4 adapted to supply to said space 3 steam for heating the liquid contained in the vessel 1. The outer wall 5 of the annular, holspace low heating body 2 tapers in a plane passingtlirough .its axis upward from the rim i up tothe rim 6. Consequently the hollow space'confined between said portion of the outer wall 5 of the heating body 2 and the evaporating vessel 2 is Haring upward. @wing to this form of the annular channel provided for the passage of the liquid to be evaporated, due consideration is given to the fact that the number of bubbles of steam rising inthe liquid contained in the vessel 1 increases toward the liquid level, f1. e. to the the steam volume is considerably liquid to be evaporated than in the lower ones. As the bubbles of steam rise verti- -cally within the liquid, they do not impinge in t e hereinbefore described device against steam bubbles contained in higher layers; o n the contrary, they pass only through particles of liquid such bubbles. rapid and obtained.

lnsteadbf arranging only one heating body 2 within the cylindrical evaporating vessel l, also more than one such body can be provided. ln the embodiment illustrated in Figs. Band 4 two annular, hollow heating bodies 8 and 9 are arranged vertically within thev evaporating vessel 1, the body 9 being arranged concentrically within 'the hollow body 8. rllhe hollow space 10 of the heating body 8 communicates' with a pipe 11 for supplying heating steam to said space 10. The latter communicates in its turn As a result of this, a more regular heating of the liquid is greater in the upper layers of the-\ which-do not contain any ico with the hollow space 12 of the outer lieating body 8 by means of three connecting i trated in Figs. 3 and 4.

I claim: A 1. A heat interchange devlce havlng a vertical axis comprising a vessel, a hollow annular body narrower in cross section at the top than at the bottom to form a chamber for heating medium gradually narrow- 4ing substantially throughout its length toward the top, and means to supply heating medium within said body at the bottom thereof.

2. A heat interchange device having a vertical axis comprising a vessel, a hollow annular heating body Within said vessel having a conical wall and a cylindrical wall and narrower in cross-section at the top than at the bottom, and means to suppl heating medium within said body near the luottom of said conical wall.

3. A heat interchange device having a vertical axis comprising concentric interconnected annular bodies, each having an inner cylindrical wall and an outer conical wall interconnected at their lower ends, thereby forming chambers for heating mediim gradually tapering toward their upper en s.

In testimony that I claim the foregoing as my invention, I have signed my name.

ELIAS WIRTH-FREY.

Witness:

ARNOLD LEHNER.v 

